US Bridges

NH118 over Lost River

Fair

Grafton County, New Hampshire · 0.1 MI W of JCT RTE 112 · Structure no. 028401290013400

Built
1941
84 years old, rebuilt 1981
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
469
2023 count
Owner
State
State Highway Agency

About this bridge

NH118 over Lost River is a steel stringer/multi-beam or girder carrying NH118 over Lost River in Grafton County, New Hampshire. It was built in 1941 and reconstructed in 1981, so it is 84 years old, older than the New Hampshire average of 56.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 469 vehicles a day, roughly 4% of them trucks, projected to reach 694 by 2043. The structure is 60 ft (18.3 m) long and 24 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

Open in Google Maps
CarriesNH118
CrossesLost River
Location0.1 MI W of JCT RTE 112
RouteState Highway 118
CountyGrafton County
StateNew Hampshire
Coordinates44.02126, -71.73204
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length60 ft (18.3 m)
Longest span57 ft (17.4 m)
Deck width24 ft (7.2 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic469 (2023)
Projected traffic694 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NH118 over Lost River built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1981.

What condition is NH118 over Lost River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does NH118 over Lost River carry?

About 469 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH118 over Lost River?

The structure is 60 ft (18.3 m) long with a longest span of 57 ft (17.4 m) and a deck 24 ft wide.

Who owns NH118 over Lost River?

It is owned by the State Highway Agency.